that somber homecoming for the four americans killed last week in benghazi, libya. president obama, vice president biden and secretary clinton were all taking part in that event as the remains of the four americans returned to american. this a is a short time ago as the four draped caskets were carried by a plane, by a military honor guard. the americans were ambushed on tuesday by assailants with rocket-propelled grenades. one of the them was chris stevens from pedemont high, graduate of 1978. graduated from hastings law in san francisco. >> i want to thank his parents and siblings who are here today for sharing chris with us and with our country. what a wonderful gift you gave us. >> they didn't simply embrace the american idol. they lived it. they embodied it. the courage, the hope and yes, the idealism. that fundamental american belief that we can leave this world a little better than before. secretary clinton attendance at the ceremony was personal for her because she said she sent ambassador stevens to libya knowing she sent him on a risky assignment. [chantin